Translucent Vehicle Trim Perforation Filling
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Solution Overview
Problem
The production of translucent paneling parts for motor vehicles faces a challenge in achieving perforations that are difficult to see with the naked eye while ensuring the clear coat uniformly fills the perforations, as insufficient filling leads to sink marks affecting visual appearance and transparency.
Innovation Solution
The use of perforations with diameters between 50 μm to 175 μm and distances between centers of adjacent perforations ranging from 1.0 to 5.0 times the diameter, ensuring the clear coat fills the perforations, combined with an optional adhesion promoter layer and specific filler materials like wollastonite, to maintain low visibility and optimal filling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If the perforation size is reduced to make them invisible with the naked eye, then the visibility of perforations is improved, but the clear coat is unable to fill the perforations sufficiently
Solution Approach 1:
The patent applies parameter changes by establishing specific quantitative ranges for perforation diameter (50-175 μm) and center-to-center distance (1.0-5.0 times the diameter). These parameter specifications resolve the contradiction by defining the optimal window where perforations remain invisible while being large enough for clear coat filling.
2Manufacturing precision
If the perforation size is increased to allow clear coat filling, then the filling quality is improved, but the perforations become visible with the naked eye
Solution Approach 1:
The patent resolves this contradiction by changing the parameters to specific ranges: perforation diameter of 50-175 μm and center distance of 1.0-5.0 times the diameter. These parameter settings ensure that perforations remain below the human eye's resolution threshold while providing sufficient space for clear coat infiltration.
3Difficulty of detecting and measuring
If the distance between perforations is reduced to maintain invisibility, then the visibility is improved, but the clear coat cannot adequately wet and fill the perforations
Solution Approach 1:
The patent applies parameter changes by specifying that the center-to-center distance between adjacent perforations should be 1.0-5.0 times the perforation diameter. This parameter relationship ensures adequate spacing for clear coat capillary action while maintaining the perforations' invisibility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach results in a translucent paneling part with improved visual appearance and transparency, while maintaining the clear coat's uniformity and adhesion, thereby enhancing the paneling part's aesthetic and functional properties.
Implementation Method 1
the diameter D of the perforations according to the invention being in a range from 50 μm to 175 μm and, wherein the distance A between the centers M of mutually adjacent perforations is in a range between 1.0 times and 5.0 times... the clear coat also fills the perforations
Implementation Method 2
the colored coating having a large number of punctiform perforations in certain areas for transillumination of the base body, which completely penetrate the colored coating
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a translucent fairing part for a motor vehicle (V) comprising a base body (1) made of a translucent or transparent polymer material, which is translucent for spectral ranges of visible light with low absorption, and at least one color-imparting coating (2) applied to the base body (1). The invention also includes a method for manufacturing such a fairing part.